Sitting at the computer, we tend to move our heads forward toward the computer. The computer is a very strong stimulus to which we tend to react by pushing our heads forward. This compresses the vertebras and shortens our neck, shoulder and thorax area. In order to avoid this, I like to remember the space behind my head and neck, and that helps me to not bend from the base of my neck. If I want to move closer to the computer, I remember that I can bend from my hips. This helps me to be upright without effort.